caohailing={'first_name':'cao','last_name':'hailing','age':'19','city':'longan'}
print(caohailing['first_name'])
print(caohailing['last_name'])
print(caohailing['age'])
print(caohailing['city'])

friend_number={
    'caohailing':19,
       'macujin':20,
       'osy':21,
       'lfb':50,
}

print(f"caohailing,{friend_number['caohailing']}")
print(f"lfb,{friend_number['lfb']}")
print(f"osy,{friend_number['osy']}")
print(f"macujin,{friend_number['macujin']}")
